Frederica of Hanover in the context of "Crown Prince of Greece"

Anne-Marie RE (Greek: Άννα-Μαρία, romanized: Ánna-María; born Princess Anne-Marie Dagmar Ingrid of Denmark, 30 August 1946) is a Danish princess who was Queen of Greece as the consort of King Constantine II from their marriage on 18 September 1964 until the abolition of the Greek monarchy on 1 June 1973.

Anne-Marie is the youngest daughter of Frederik IX of Denmark and Ingrid of Sweden. In 1964, she married Constantine and became queen consort of Greece. They had five children: Princess Alexia, Crown Prince Pavlos, Prince Nikolaos, Princess Theodora, and Prince Philippos. As queen, Anne-Marie spent much of her time working for a charitable foundation known as "Her Majesty's Fund", a foundation established by her mother-in-law, Queen Frederica of Greece. In 1967, Anne-Marie and her family were forced into exile upon the rise of a military dictatorship. After fleeing to Rome, they eventually settled in London, when the Greek monarchy was officially abolished.

Sofía (Sophia Margarita Victoria Frederica; Greek: Σοφία Μαργαρίτα Βικτώρια Φρειδερίκη, romanized: Sofía Margaríta Bictória Freideríki; born 2 November 1938) is a member of the Spanish royal family who was Queen of Spain from 1975 to 2014 as the wife of King Juan Carlos I until his abdication. She is the eldest child of King Paul and Queen Frederica of Greece.

Sofía married then Infante Juan Carlos of Spain in 1962 and became queen of Spain upon her husband's accession in 1975. On 19 June 2014, Juan Carlos abdicated in favour of their son Felipe VI. Since her spouse's abdication, Doña Sofía has usually been referred to as reina emérita ('queen emerita') by the press.

Sofía (Sophia Margarita Victoria Frederica; Greek: Σοφία Μαργαρίτα Βικτωρία Φρειδερίκη, romanized: Sofía Margaríta Victoría Freideríki; born 2 November 1938) is a member of the Spanish royal family who was Queen of Spain from 1975 to 2014 as the wife of King Juan Carlos I until his abdication. She is the eldest child of King Paul and Queen Frederica of Greece.

Sofía married then Infante Juan Carlos of Spain in 1962 and became queen of Spain upon her husband's accession in 1975. On 19 June 2014, Juan Carlos abdicated in favour of their son Felipe VI. Since her spouse's abdication, Doña Sofía has usually been referred to as reina emérita ('queen emerita') by the press.

Princess Irene of Greece and Denmark R.E. (Greek: Ειρήνη, romanized: Iríni; born 11 May 1942) is the youngest child and second daughter of King Paul of the Hellenes and his wife, Queen Frederica. She is the younger sister of Queen Sofía of Spain and the late King Constantine II of the Hellenes. She is also the great-granddaughter of Wilhelm II, German Emperor, who was the first grandson of Queen Victoria.